what is the solubility of a salt in g/dm³ if 0.49 of it is obtained on evaporating 200cm³ of its saturated solution to dryness​

What are the concentrations of hydroxide and hydronium ions in a solution with a ph of 10.2?

Consider this initial-rate data at a certain temperature for the reaction described by

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt